ReplaceClipCullDistanceVariable.h

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//

// Copyright 2020 The ANGLE Project Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

//

// ReplaceClipCullDistanceVariable.h: Find any references to gl_ClipDistance or gl_CullDistance and

// replace it with ANGLEClipDistance or ANGLECullDistance.

//

#ifndef COMPILER_TRANSLATOR_TREEUTIL_REPLACECLIPCULLDISTANCEVARIABLE_H_

#define COMPILER_TRANSLATOR_TREEUTIL_REPLACECLIPCULLDISTANCEVARIABLE_H_

#include "GLSLANG/ShaderLang.h"

#include "common/angleutils.h"

namespace sh

struct InterfaceBlock;

class TCompiler;

class TIntermBlock;

class TSymbolTable;

class TIntermTyped;

// Replace every gl_ClipDistance assignment with assignment to "ANGLEClipDistance",

// then at the end of shader re-assign the values of this global variable to gl_ClipDistance.

// This to solve some complex usages such as user passing gl_ClipDistance as output reference

// to a function.

// Furthermore, at the end shader, some disabled gl_ClipDistance[i] can be skipped from the

// assignment.

[[nodiscard]] bool ReplaceClipDistanceAssignments(TCompiler *compiler,

                                                  TIntermBlock *root,

                                                  TSymbolTable *symbolTable,

                                                  const GLenum shaderType,

                                                  const TIntermTyped *clipDistanceEnableFlags);

[[nodiscard]] bool ReplaceCullDistanceAssignments(TCompiler *compiler,

                                                  TIntermBlock *root,

                                                  TSymbolTable *symbolTable,

                                                  const GLenum shaderType);

}  // namespace sh

#endif